There is more than 200G of space on the C drive. Suddenly one day, it prompts that there is not enough space left on the C drive. I checked in the storage of win10 and found that the hibernation file took up more than 100G. The win10 system has a hibernation function. If you don't think you need to use the hibernation function, you can delete the hiberfil.sys file. The following will teach you how to disable the hibernation file of win10 and completely delete hiberfil.sys. Follow me step by step.